Apache Airflow Amazon provider: AWS auth manager: SAML login CSRF logs users into the attacker's account

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86467
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-20 03:17:16 UTC
Updated2026-10-20 19:35:38 UTC
DescriptionApache Airflow Amazon provider: the AWS auth manager's SAML login flow does not bind the authentication response to the browser that began it. The login handler discards the AuthnRequest ID and the callback validates the assertion without requiring a matching InResponseTo, so an unauthenticated attacker who can cause a victim to load a page can complete a SAML login in the victim's browser using the attacker's own assertion, silently logging the victim into the attacker's Airflow account. Subsequent work the victim performs lands in a session the attacker controls. Affects deployments using the AWS auth manager with SAML authentication. The victim needs only to visit an attacker-controlled page; no Airflow account or credential is required of the attacker. This is the same login-CSRF class fixed in the Keycloak auth manager as CVE-2026-40948. Users of apache-airflow-providers-amazon are recommended to upgrade to version 9.38.0, which fixes the issue.

Risk And Classification

EPSS: 0.001730000 probability, percentile 0.063280000 (date 2026-10-20)

Problem Types: CWE-352 | CWE-352 CWE-352: Cross-Site Request Forgery (CSRF)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Airflow Amazon Provider affected 9.38.0 semver Not specified

References

ReferenceSourceLinkTags
www.cve.org/CVERecord [email protected] www.cve.org
lists.apache.org/thread/xr9d2jyk9qpglsmromt6vjl4s9jb5qn8 [email protected] lists.apache.org
github.com/apache/airflow/pull/73698 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andrew Rukin (Arenadata) (en)

CNA: Jarek Potiuk (en)

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